Induced transparency by interference or polarization
Induced transparency by interference or polarization
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DOI：
10.1073/pnas.2012982118
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发表时间：
2021-01
期刊：
影响因子：
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通讯作者：
Changqing Wang;Xuefeng Jiang;William R. Sweeney;Chia-Wei Hsu;Yiming Liu;Guangming Zhao;B. Peng;Mengzhen Zhang;Liang Jiang;A. Stone;Lan Yang
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文献类型：
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作者：
Changqing Wang;Xuefeng Jiang;William R. Sweeney;Chia-Wei Hsu;Yiming Liu;Guangming Zhao;B. Peng;Mengzhen Zhang;Liang Jiang;A. Stone;Lan Yang
重要意义电磁感应透明(EIT)描述不透明的光学介质由于干涉效应而变得透明的现象。EIT在设计慢光和量子存储器方面发挥着关键作用。然而，极化效应也会引起类似的现象，因此有时被认为是EIT。我们研究了光学谐振腔中的偏振效应对EIT的影响，发现了偏振诱导透明(PIT)现象，即系统在一个方向是透明的，而在另一个方向是不透明的。PIT是极化效应的结果，而不是波的干涉，因此与EIT有根本的不同。这项研究解决了EIT和偏振效应之间的混淆，这对光存储器的设计是至关重要的，并为其他控制波传播的技术铺平了道路。在电磁感应透明(EIT)的全光模拟中，光场的偏振是一个至关重要的自由度。然而，EIT和偏振诱导现象的物理起源还没有得到很好的区分，这可能会导致慢光和光/量子存储等相关应用的混淆。在这里，我们研究了各种光学EIT系统中的偏振效应。我们发现，在两个间接耦合的谐振器中，耳语走廊模之间的偏振失配可以在透射谱中诱导出一个类似于EIT线型的窄透明窗口。然而，这种极化诱导透明(PIT)不同于EIT：它起源于强烈的极化旋转效应，并表现出单向性特征。PIT和EIT的共存为光学谐振系统中的光流操纵提供了额外的途径。
Significance Electromagnetically induced transparency (EIT) describes the phenomenon that an opaque optical medium becomes transparent due to interference effects. EIT plays a pivotal role in engineering slow light and quantum memory. However, polarization effects could cause similar phenomena and therefore were considered as EIT occasionally. We investigate the polarization effects on EIT in optical resonators and discover a polarization-induced transparency (PIT) phenomenon that the system is transparent in one direction but opaque in the other. PIT results from the polarization effects rather than wave interference and thus fundamentally differs from EIT. This study resolves the confusion between EIT and polarization effects, which is crucial for optical memory design and paves the way to additional techniques for controlling wave propagation. Polarization of optical fields is a crucial degree of freedom in the all-optical analogue of electromagnetically induced transparency (EIT). However, the physical origins of EIT and polarization-induced phenomena have not been well distinguished, which can lead to confusion in associated applications such as slow light and optical/quantum storage. Here we study the polarization effects in various optical EIT systems. We find that a polarization mismatch between whispering gallery modes in two indirectly coupled resonators can induce a narrow transparency window in the transmission spectrum resembling the EIT lineshape. However, such polarization-induced transparency (PIT) is distinct from EIT: It originates from strong polarization rotation effects and shows a unidirectional feature. The coexistence of PIT and EIT provides additional routes for the manipulation of light flow in optical resonator systems.